The articles are ok though (but quite a few got posted here as well).
But the discussion is just about non-existent. I've gotten a bit wary of HN split-offs, they tend to be very short-lived.
I don't know what the main reason for that is, possibly it is simply that HN is 'good enough' and that a splinter of it does not carry enough volume for long term sustainability.
I agree, there aren't enough people on techstartu.ps, but there were even fewer earlier and it seems to be picking up. I'd guess that this one is here to stay, especially since it's run by DuckDuckGo founder Gabriel Weinberg.
I see your point, but the request was for "a library of the 'best' startup focused articles written across the net", not commentary on those articles.
The comments will come with time; right now there aren't many contributors, but the site has been around long enough and been updated frequently enough that I believe it will stick around. HN was kind of slow moving when it started, too (although not that slow, to be honest).
